This article explores the characteristics of parental child sex offenders and offending behaviours and examines the commonalities and differences between this subgroup of offenders and other child sexual offenders. Data for the study was obtained from the New South Wales Pre-Trial Diversion of Offenders Program (Cedar Cottage) which provides treatment to parental child sex offenders. Offenders who are accepted into the community-based treatment program have entered a guilty plea. Treatment consists of bi-weekly therapy sessions over two to three years. It was found that most offenders were not sexually abused as children and the offenders in the sample appeared unlikely to commit sexual offences against children other than their own, unlike paedophiles who were sexually attracted to all children. Previous studies on Cedar Cottage found that this diversion program reduced recidivism. It was also found that this group, similar to extra-familial child sexual offenders, is criminally versatile and it is recommended that treatment should address their general criminogenic proclivities as well as sexual offending.